Macau is country code +853.
There are no area codes within Macau. Most numbers are 8 digits after the country code +853. Most ordinary landline numbers begin with +853 2. Direct dial-in numbers begin with +853 8. Most mobile numbers begin with +853 6.
Macau is country code +853.
Leichtenstein is telephone country code +423.
where is telephone country code 1816
That is not a country code.
There is no 909 country code.
There is no telephone country code +897, nor +89, nor any other country code beginning with +89. There are no valid telephone numbers beginning with +89.
Gibraltar is country code +350.
Moldova is country code +373.
Slovenia is country code +386.
Togo is country code +228.
Liberia is country code +231.
Angola is country code +244.
Mozambique is country code +258.